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In the eyes of consumers, the value of perishable goods generally declines during the good's lifetime. In this situation a mechanism to encourage purchases, such as discounts or reduction in price policy can be effective. In this paper, we determine the discount time and the prices for a perishable product with a one period lifetime. Product demand is dependent on price and time. Demand function is different after discount time to an increase in costumer. After modeling, we show that the profit function is concave and optimal price and the discount time is unique. Due to the complexity of the model, using a heuristic algorithm, the near optimal price and the near optimal discount time are calculated.

In this study, the distributor in charge of freight transport is responsible for replenishing the buyer's inventory level, with the government intervening in the supply chain to reduce greenhouse gas (GHG) emissions. In the proposed model, a periodic review replenishment policy is applied by the buyer, whereby the distributor is responsible for determining the optimal review period. Therefore, a game theory approach is used to show how government intervention influences the replenishment decisions, transportation, and safety factor. Due to the government constraint imposed to control GHG emissions, the distributor has to set a longer review period involving fewer trucks, resulting in his/her decision leading to more shortage costs for the buyer. The results of four numerical examples indicate that the buyer is not given any incentives to cooperate with the distributor due to his/her reduced revenue. Hence, this study proposes two‐part tariff (TPT) and cost‐sharing (CS) contracts to increase the profitability of both players. Finally, the results show that both coordination mechanisms can effectively coordinate the supply chain, but the TPT contract can also reduce GHG emissions. Furthermore, in all scenarios where the government constraint is implemented, the number of unfilled trucks in each replenishment inventory has been decreased.

No abstract